package com.lsongh.filter;

import com.lsongh.entity.User;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;


public class LoginFilter implements Filter {
    @Override
    public void destroy() {

    }

    @Override
    public void doFilter(ServletRequest req, ServletResponse resp,
                         FilterChain chain) throws IOException, ServletException {
        HttpServletRequest hsq = (HttpServletRequest) req;
        User u = (User) hsq.getSession().getAttribute("loginUser");
        if (u == null) {
            ((HttpServletResponse) resp).sendRedirect(hsq.getContextPath() + "/user/login");
        }
        chain.doFilter(req, resp);
    }

    @Override
    public void init(FilterConfig arg0) throws ServletException {

    }

}
